MARYNNE
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49 CALCUL MENTAL Transformer les soustractions en additions puis calculer. A= 12 - 14 B=7-(-3) C=-8-(-9) D = 17 - 14 E=-3-(-5) F=-9-8 aider moi a trouvé svp​

Sagot :

Bonjour,

A= 12 - 14 = 12 + ( -14) = -2

B=7-(-3)  = 7+3 = 10

C=-8-(-9) = 9+(-8)  = 1

D = 17 - 14 = 17 +(-14)  =3

E=  -3-(-5) = 5+(-3) =2

F=-9-8 = +(-9) + (-8)  = -17